An observation study of mathematics instruction for students with IDD in grades K-2.

Researchers watched 52 K-2 self-contained rooms for kids with intellectual or developmental disabilities.

They timed how many minutes were labeled “math” on the schedule and how many minutes were real teaching.

They also scored lesson quality and how engaged the kids looked.

Only 61 % of the time marked “math” on the schedule turned into actual instruction.

When teaching did happen, the quality landed in the low-average range and student attention was only medium.

Chung et al. (2019) saw the same low engagement pattern in high-school inclusive rooms. Their students with IDD talked to peers only 25 % of intervals and to teachers 10 %.

Huang et al. (2023) also watched special-ed classes in 2023. Teachers said they individualize lessons, but observers saw mostly whole-group teaching—matching the low-quality scores in R et al.

Bryant et al. (2021) tried a small-group numeracy program for second graders without IDD and lifted basic skills. Their positive results hint that better math time use is possible when instruction is tight and small.

You can’t improve math scores if only six of every ten scheduled minutes are real teaching. Start by timing your own lessons with a simple stopwatch. Aim to turn every “math” minute into active teaching—model, prompt, check each child, and keep the pace quick. Small tweaks here could claw back weeks of lost learning each year.