An important place to start with formative assessment is Dylan Wiliam and Paul Black's Inside the black box. This document is a strong argument for increased use of formative assessment as well as a call to focus professional development on this issue.
Dylan Wiliam's 5 formative assessment strategies are essentially these:
provide learning goals
elicit evidence of learning
provide feedback
use students as resources to each other
develop metacognitive abilities in students
Dylan noted that embedded in these 5 strategies are what he calls "responsive teaching" - which captures the kind of micro-assessment strategies and decisions that teachers make in the classroom.
Dylan has written a few books on the topic of formative assessment. An important and very practical one is called "Embedding Formative Assessment".
The ultimate goal of formative assessment is to provide feedback both to the student about their learning and to the instructor about their teaching. Each of Dylan's strategies come with techniques (see below).
Clarifying, understanding, and sharing learning intentions
If you don't know where you're going you'll never get there
What does excellence look like?
Engineering effective classroom discussions, tasks and activities that elicit evidence of learning
Cold calling (see example on the right)
No opt-out
Checks for understanding
Probing questions
Think pair share
Say it again - but say it better
Whole class responses (e.g. finger voting or hinge point questions, etc.)
Providing feedback that moves learners forward
Praise hard work not intelligence
Focus on self-efficacy, not self-esteem
Give task-involving, rather than ego-involving feedback (i.e. don't do: 'you need to put more effort' - do: 'there is a mistake on line 6, find it and fix it.')
Build students' capacity to use feedback (practice improving an anonymous students work from another class that has received feedback)
Feedback should focus on what's next, not what's passed
Don't give feedback unless you allocate class time for students to respond
Feedback should be more work for the students than the teacher
Don't make feedback too specific (don't do all the thinking for your students)
Provide a balance of critical and supportive feedback (consider using a single point rubric)
Grades are NOT feedback
Activating students as learning resources for one another
Use peer feedback (Note: easier said than done. Perhaps ask a consultant to help you lay the necessary foundations in your class to make this happen)
Provide sentence starters (e.g. "I think it would be clearer if...")
Start with peer assessment of anonymous work
Start in pairs before going into larger groups (e.g. think pair share)
Prioritize individual accountability in peer assessment (or group work)
Activating students as owners of their own learning
Use self-reports, but don't rely on them
Focus self-assessment on improvement, not on standards ("Never grade a student while they are still learning." - Alfie Kohn)
Make self-assessment a routine part of class work (exit slip?)
Question parking lot
In self-evaluations, have students identify changes they need to make, but not make them (yet)
Have student-led Parent-Teacher conferences (prepare a list of sentence starters or reflection questions for suddenly shy students. e.g. 'what help do I need from my parents?' or 'What help do I need from my teacher?')
Nurture both intrinsic and extrinsic motivation