Effects of immediate self-correction, delayed self-correction, and no correction on the acquisition and maintenance of multiplication facts by a fourth-grade student with learning disabilities.

This study compared the effects of immediate self-correction, delayed self-correction, and no correction on the acquisition and maintenance of multiplication facts by a fourth-grade student with learning disabilities. Data from daily and maintenance tests indicated that both correct response rate and accuracy were higher when self-correction was immediate rather than delayed or absent.

Effects of response cards during lesson closure on the academic performance of secondary students in an earth science course.

This study evaluated the effects of two review techniques on secondary students' recall of science lesson content: (a) an active review condition in which students used response cards to answer questions, and (b) a passive review condition in which students looked and listened while the teacher projected and read key lesson points. Scores on next-day and weekly tests were higher on lesson content reviewed with response cards.

Long-term use of intrauterine contraceptive devices in a private practice.

Clinical experience with 1504 insertions of intrauterine contraceptive devices (Lippes Loop, Dalkon Shield, Cu-7) in a private practice is evaluated. Expulsion rates and removal rates for bleeding and/or pain and personal reasons differed for the three types of devices. Pregnancy rates associated with use of the three types of devices were similar. Pelvic inflammatory disease rates were similar for Dalkon Shield and Cu-7 users but were higher than the rate for Lippes Loop users. Use of intrauterine contraceptive devices did not appear to compromise future fertility based on the experience of women who had the devices removed. The study shows that long-term IUD use (up to 5 years) provides a safe and effective method of contraception.