How does Morphology apply to reading and teaching English Language Learners how to read?

Skilled readers are known to rely on morphology to help them segment words and support fluent reading. However, it doesn't matter whether this segmentation is correct. For instance, the -er in 'teacher' and in 'corner' is equally useful for somebody who is trying to quickly decode those words. Somebody who cannot do that will have to develop a greater inventory of words they have to learn to read as disconnected chunks.

Any way that can support learners metacognition is likely to be helpful in reading as well as writing and speaking. Showing both first language and additional language students the principles of word formation is likely to be extremely helpful for any language (perhaps even more so in English where segmentation at the level of morphemes can help overcome the irregularities at the level of grapheme-phoneme correspondence). Just be aware that the point is not to get the analysis right as long as you can use the analytic strategy to help you with a word or an expression.