SEDL often publishes very useful research briefings, but I wouldn’t put their new one on formative assessment into that category.
It does provide excellent research that any teacher can use to support his/her use of formative assessment in the classroom. However, it is surprisingly devoid of any practical hints on how to employ the practice.
Since it’s always nice to have back-up evidence, I’m still adding it to The Best Resources For Learning About Formative Assessment. You’ll find lots of practical tips there.