High school math intervention programs: math intervention for high school students that names the broken step in Algebra 1

Your Algebra 1 support block has twelve students who all failed the same equation for different reasons. Coeducate tutors each one with hints, names the step that broke, and hands you tomorrow's groups before the bell.

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The short answer

What a high school math intervention program should do in grades 9 to 12

Coeducate is math intervention software for high school Tier 2 blocks, Algebra 1 support periods and math labs. Each student works problems from your course material with an AI tutor that asks the next question instead of giving the answer. Every session ends with a dated, per-skill mastery record that names the specific step that failed, such as distributing over only the first term or dropping the sign when moving a term across the equals sign, with the student's own working quoted as evidence.

It does not replace your Algebra 1 course, your screener or a credit recovery program. It removes the part of the support period that eats the time: working out, paper by paper, which prerequisite each student is missing.

At a glance

Courses: Pre-algebra to Algebra 2, grades 3 to 12 available
Block type: Double block, math lab, pull-out, after school
Group size: Any, the record is per student
Diagnosis: Named broken step per skill
Teacher data entry: None
Export: CSV on every tier
Training on student work: Never

01 Why grades 9 to 12

Why high school math intervention lives or dies in ninth grade

On the 2024 NAEP mathematics assessment, 45 percent of twelfth graders scored below the Basic level, the largest share ever reported, and the average score was the lowest since the assessment began in 2005, according to the Nation's Report Card. Those students did not fall behind in twelfth grade. They fell behind in ninth.

The UChicago Consortium on School Research showed that students who finish ninth grade on track are about three and a half times more likely to graduate in four years than students who do not (Allensworth and Easton, 2005), and Algebra 1 is the core course ninth graders fail most. Most of those failures are not algebra. They are a grade 6 to 8 skill that the course assumed, showing up inside an equation.

Distributes to the first term only

Writes 3(x - 4) = 3x - 4. The 3 never reaches the 4, and every equation with parentheses comes out wrong by a constant.

Drops the sign across the equals sign

Moves 2x from the right side to the left and keeps it positive: 3x + 2x = 5 instead of 3x - 2x = 5.

Squares a binomial term by term

Writes (x + 3)² = x² + 9. The middle term vanishes, and factoring and completing the square fail for the same reason.

Reads slope as run over rise

Takes the points (1, 2) and (3, 8) and reports a slope of 1/3. The line is graphed, the equation is written, and both are wrong the same way.

Each of these produces a wrong answer that a score marks as "cannot solve linear equations". The reteach is different for all four, and the block only works if the teacher knows which one each student has before the period starts.

02 Inside the block

What a 45-minute Algebra 1 support period looks like with the software

Minutes 0 to 5: start from yesterday's cards

Cards from the last session arrive sorted by the step that broke, so twelve students sit in three groups by what they got wrong, not by their last test score.

Minutes 5 to 25: students work, the tutor coaches

Each student works items from your Algebra 1 material. When a step breaks, the tutor asks one question aimed at that step. In Socratic mode it never gives the corrected value.

Minutes 25 to 32: you read the skill view

The class view groups the new cards by skill. Two or three red skills across the group is the normal picture. Three of them are usually prerequisites from grade 7, not algebra.

Minutes 32 to 45: a targeted reteach

Each card ends with a short reteach for the named step. You run it with the students who share it, and tomorrow's card shows whether it moved.

The same shape works for a math lab that meets three days a week, a pull-out group during an elective, or an after-school session run by a paraprofessional. The card is written from a single piece of work, so it does not care how long the block is or who is in the room.

03 Example output

One Algebra 1 answer, one named broken step

The item

Solve for x: 3(x - 4) = 2x + 5

The student wrote

"3x - 4 = 2x + 5. 3x - 2x = 5 + 4. x = 9."

A score marks it wrong and moves on. The card shows the student collected like terms correctly and moved terms across the equals sign with the right signs, but distributed the 3 over the x only. That calls for a two-minute reteach on the distributive property, not another week of solving equations.

Running the same diagnosis in whole-class Algebra 1 practice rather than a support period? That is the AI math tutor that names the misconception.

Session evidence card, grade 9, Algebra 1

Fixed example

Diagnosis

Distributes over the first term only

The student expanded 3(x - 4) as 3x - 4, so the constant on the left is off by 8. Every later step is correct for the equation the student actually wrote. With 3x - 12, the solution is x = 17.

Next tutoring move / hint only

Try 3(x - 4) with x = 4. What should the left side equal? Now put x = 4 into your 3x - 4. Do they match?

Skill mastery read

Distributive property over subtraction

Not yet

22%

Wrote 3(x - 4) = 3x - 4, multiplying only the first term inside the parentheses.

Moving terms across the equals sign

Secure

84%

Subtracted 2x from both sides and added 4 to both sides with the correct signs.

Collecting like terms

Secure

88%

Combined 3x - 2x to x and 5 + 4 to 9 without error.

Checking a solution by substitution

Developing

35%

Did not substitute x = 9 back into the original equation, which would have shown 15 on the left and 23 on the right.

Teacher note

Equation-solving steps are secure. Any item with a coefficient outside parentheses fails by the same constant, so factoring, area models and two-step inequalities are at risk for the same reason.

Reteach in 5 minutes

Multiply every term, then check with a number

Draw 3(x - 4) as three copies of (x - 4) and count the x terms and the 4s.
Rewrite as 3x - 12 and solve again. Compare x = 17 with x = 9.
Substitute x = 17 into the original and confirm both sides equal 39.

04 Research alignment

How the software lines up with the What Works Clearinghouse algebra recommendations

The three recommendations below come from the Institute of Education Sciences practice guide Teaching Strategies for Improving Algebra Knowledge in Middle and High School Students (Star et al., 2015, revised 2019). The right-hand column matters as much as the one next to it.

WWC recommendation	Evidence level	What Coeducate does	What it does not do
Use solved problems to engage students in analyzing algebraic reasoning and strategies	Minimal	Every card quotes the student's own solved problem and marks the step that broke, which is the worked example the guide asks teachers to discuss.	It does not supply a bank of pre-written solved problems for whole-class discussion.
Teach students to utilize the structure of algebraic representations	Minimal	The skill vocabulary separates structure errors (distribution, sign, binomial expansion) from arithmetic slips, so the reteach targets the structure.	It does not teach the structure lesson itself. The teacher delivers the reteach.
Teach students to intentionally choose from alternative algebraic strategies when solving problems	Moderate	Tutor hints ask the student to try a second route (substitute a number, draw the expression, work backward) and the card records which route the student can use.	It does not generate a strategy curriculum or sequence the alternatives across a unit.

Use solved problems to engage students in analyzing algebraic reasoning and strategies

Evidence level: Minimal

What Coeducate does: Every card quotes the student's own solved problem and marks the step that broke, which is the worked example the guide asks teachers to discuss.
What it does not do: It does not supply a bank of pre-written solved problems for whole-class discussion.

Teach students to utilize the structure of algebraic representations

Evidence level: Minimal

What Coeducate does: The skill vocabulary separates structure errors (distribution, sign, binomial expansion) from arithmetic slips, so the reteach targets the structure.
What it does not do: It does not teach the structure lesson itself. The teacher delivers the reteach.

Teach students to intentionally choose from alternative algebraic strategies when solving problems

Evidence level: Moderate

What Coeducate does: Tutor hints ask the student to try a second route (substitute a number, draw the expression, work backward) and the card records which route the student can use.
What it does not do: It does not generate a strategy curriculum or sequence the alternatives across a unit.

The guide's own evidence ratings are modest, which is worth knowing before any vendor tells you their product is "research based". Coeducate has no efficacy study of its own. What it has is a record, per student and per session, that lets you run the recommendations with less guesswork.

05 Comparison

Math intervention programs for high school students compared: where software fits

High schools usually buy one of five things for math intervention. They solve different problems, and most schools need two of them. This is a category comparison, not a ranking of vendors.

Question	Structured intervention curriculum	Adaptive practice software	Credit recovery course	Tutoring provider	Coeducate
What you get	A scope and sequence with lessons and materials, often blended	Leveled practice with automatic scoring and a mastery chart	A full online course that awards the credit	Trained tutors, in person or virtual	An AI tutor over your material plus a per-skill record of the step that broke
Explains why an answer was wrong	Through the teacher delivering it	Usually marks right or wrong and adjusts the level	Marks the item, sometimes shows a worked solution	Yes, if the tutor writes it down	Yes, a named step per skill with the working quoted
Who runs the block	Teacher or interventionist	The software, with a teacher monitoring	The software, with a proctor	The provider's tutors	Your teacher or a trained paraprofessional
Uses the Algebra 1 material you already teach	No, you adopt theirs	No, their item bank	No, their course	Varies by provider	Yes
Awards course credit	No	No	Yes	No	No
Independent efficacy evidence	Varies, many publish studies	Varies by product	Varies, and the research on online credit recovery is mixed	Varies by provider	None yet
How it is bought	Per-student or site license, often multi-year	Per-student license, $36 to $48 a year at list	Per-seat or per-course	Per-student or per-hour contract	$89 to $1,290 per month, PO on District

What you get

Structured intervention curriculum: A scope and sequence with lessons and materials, often blended
Adaptive practice software: Leveled practice with automatic scoring and a mastery chart
Credit recovery course: A full online course that awards the credit
Tutoring provider: Trained tutors, in person or virtual
Coeducate: An AI tutor over your material plus a per-skill record of the step that broke

Explains why an answer was wrong

Structured intervention curriculum: Through the teacher delivering it
Adaptive practice software: Usually marks right or wrong and adjusts the level
Credit recovery course: Marks the item, sometimes shows a worked solution
Tutoring provider: Yes, if the tutor writes it down
Coeducate: Yes, a named step per skill with the working quoted

Who runs the block

Structured intervention curriculum: Teacher or interventionist
Adaptive practice software: The software, with a teacher monitoring
Credit recovery course: The software, with a proctor
Tutoring provider: The provider's tutors
Coeducate: Your teacher or a trained paraprofessional

Uses the Algebra 1 material you already teach

Structured intervention curriculum: No, you adopt theirs
Adaptive practice software: No, their item bank
Credit recovery course: No, their course
Tutoring provider: Varies by provider
Coeducate: Yes

Awards course credit

Structured intervention curriculum: No
Adaptive practice software: No
Credit recovery course: Yes
Tutoring provider: No
Coeducate: No

Independent efficacy evidence

Structured intervention curriculum: Varies, many publish studies
Adaptive practice software: Varies by product
Credit recovery course: Varies, and the research on online credit recovery is mixed
Tutoring provider: Varies by provider
Coeducate: None yet

How it is bought

Structured intervention curriculum: Per-student or site license, often multi-year
Adaptive practice software: Per-student license, $36 to $48 a year at list
Credit recovery course: Per-seat or per-course
Tutoring provider: Per-student or per-hour contract
Coeducate: $89 to $1,290 per month, PO on District

HMH Math 180 (grades 5 to 12) and Carnegie Learning MATHia are well-known examples of the first column, and ALEKS is the most common example of the second. We priced ALEKS from McGraw Hill's published rate card and four public district quotes in ALEKS cost and pricing for schools. If your school has no Algebra 1 support material at all, buy a curriculum first. Coeducate reads the work students produce from material you already have, which is why it sits next to a curriculum or a practice program rather than competing with one. The same records feed the MTSS progress monitoring software view your intervention team reads at the end of a cycle.

06 Being straight about it

When a high school math intervention program is the wrong purchase from us

Your state or grant requires an ESSA evidence tier. Coeducate has no efficacy study and no evidence tier rating. If funding depends on one, spend that money on a program that has it.
You need the credit, not the skill. A student who has to recover an Algebra 1 credit by June needs a course that awards it. Coeducate can sit inside that course, but it is not one.
The gap is basic fact fluency. If ninth graders mostly need fast recall of multiplication facts and integer rules, a daily fluency routine does more than a diagnosis of reasoning they are not yet ready to use.
Students cannot type their working. The tutor reads written work. For students who cannot yet produce it independently, a human tutor in the room is the better spend.

07 Who uses it

Built for the people who run the Algebra 1 support period

Algebra 1 teacher with a double block

Teaches the credit-bearing section and the support section to the same students. The card tells them which prerequisite to reteach in the second period, so the support block stops being a slower replay of the first.

High school math interventionist

Runs three or four groups a day across grade levels. The card replaces re-marking the same papers after school to find the pattern, and the regrouping for tomorrow is already done.

Math department chair or MTSS lead

Decides at the end of a six to eight week cycle whether to continue, intensify or exit. Dated per-skill records with the student's own working attached make that meeting shorter and the ninth-grade on-track report more defensible.

Principal or director who signs the PO

Needs the cost and a privacy posture that survives review. The student privacy and COPPA compliance page lists what we hold and, just as plainly, what we do not.

08 FAQ

Questions high schools ask before buying a math intervention program

Comparing against a practice program you already run? We read the public quotes behind i-Ready cost per student and the honest case for an IXL alternative for schools.

What is the best math intervention program for high school students?

The best program matches the reason students are behind. If they never had a coherent Algebra 1 sequence, a structured intervention curriculum such as HMH Math 180 or Carnegie Learning MATHia fits. If they have the course but keep failing the same equation types for different reasons, software that names the broken step per student saves the most block time. Many high schools run one of each, and the second one is what Coeducate does.

What does math intervention look like in high school?

Most high schools run it as a second math period, often called a double block, a math lab or an Algebra 1 support class, taken alongside the credit-bearing course. A typical period is 45 to 50 minutes with 8 to 15 students. The teacher reteaches the prerequisite skills the main course assumes, and the block succeeds or fails on whether the teacher knows which skill each student is missing.

What are Tier 2 math interventions in high school?

Tier 2 is targeted small-group support for students who are below grade level but not so far behind that they need an individualized program. In high school it usually means a scheduled support period, a small group inside the Algebra 1 class, or before and after school sessions, monitored every six to eight weeks. Coeducate produces the per-skill record those monitoring meetings run on.

Why does Algebra 1 matter so much for graduation?

Ninth grade is the year that predicts graduation. The UChicago Consortium on School Research found that students who finish ninth grade on track, meaning enough credits and no more than one failed core course, are about three and a half times more likely to graduate in four years than students who are off track, and Algebra 1 is the core course ninth graders fail most often. Fixing Algebra 1 in the fall is cheaper than credit recovery in the summer.

Does Coeducate replace a credit recovery course?

No. Credit recovery is a course with seat time, a syllabus and a transcript credit at the end. Coeducate is a tutor that sits inside whatever course or block you already run, coaching a student through one problem at a time and writing a record of what broke. Schools use it inside the support period so fewer students need credit recovery, not instead of it.

How much does a high school math intervention program cost?

Adaptive practice programs run roughly $36 to $48 per student per year at list price, and structured curricula are usually licensed per student or per site on multi-year terms. Coeducate is priced per program rather than per seat: Classroom is $89 per month for one educator and up to 60 students, School is $349 per month for up to 600 students, District is $1,290 per month with purchase order billing. Full detail is on the pricing page, and we priced ALEKS from public quotes in ALEKS cost for schools.

Does it work for students who are still missing middle school skills?

Yes, and that is the normal case. A ninth grader failing Algebra 1 is usually failing it on fractions, integers, ratio or order of operations, not on algebra. The card names the prerequisite that broke, so the reteach goes to the grade 6 to 8 skill rather than to another round of the equation. The middle school math intervention software page describes that skill vocabulary.

Is student work used to train AI models?

No. Student work is not used to train models, not sold and not used for advertising, and records are deletable on request. Coeducate is designed around FERPA and COPPA obligations, but it holds no SOC 2 report or signed state data privacy agreement today, and the student privacy page says so plainly.

09 Pricing

Priced per program, not per seat

Annual billing is about 17% lower. There is no free tier, and the privacy posture is identical on every plan.

Classroom

$89/mo

One teacher, up to 60 students, CSV mastery export.

School

$349/mo

Up to 10 educators and 600 students, roles, SSO, scheduled reports.

District

$1,290/mo

Up to 75 educators and 5,000 students, standards mapping, SIS export, PO billing.

Full pricing and Enterprise

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