Math practice and its influence on math skills and executive functions in adolescents with mild to borderline intellectual disability.

The team ran a five-week RCT in special-ed classes. Teens with mild or borderline ID used a math-drill program three times a week. The control group kept getting their usual math lessons.

Each session lasted about 15 minutes. Kids clicked answers on a laptop and got instant right-or-wrong feedback.

The practice group scored a little higher on math tests at the end. The gain was small but real compared with the control group.

Executive-function tests did not budge. More math reps helped with numbers, not with shifting attention or holding rules in mind.

Barton et al. (2019) also used computer drills, but with adults who have Down syndrome. They saw tiny EF gains while J et al. saw none. The difference: E tested brain games aimed at EF; J tested math games aimed at facts.

Hoyle et al. (2022) got a small EF boost after 12 weeks of community exercise with teens who have Down syndrome. Again, the active ingredient was physical activity, not screen-based math. The pattern shows EF changes only when the training directly targets EF or uses movement, not when math is the focus.

Smith et al. (2014) ran a short classroom program for kids with mild ID and saw big hygiene gains. Like J, the study kept lessons short and frequent, but the skill was hand-washing, not math. Together the papers say: brief, well-planned drills can improve the skill you practice, but transfer is rare.

If you teach math to students with MBID, add short, high-frequency computer drills to the week. Expect modest gains in math facts, not in executive function. Track the specific skill you drill; do not assume it will spill over. Five extra weeks is enough to see a measurable bump, so you can test the tweak before an IEP meeting and show data.