Let me try on my understanding based on Swami Krishnanand Commentary on Panchdasi (Divine Life Society) since I have missed initial lectures.
Prakriti (प्रकृति, prakṛti, primordial substance) is that in which there is the reflection of Brahman (ब्रह्मन्, brahman) that is pure consciousness and bliss and is composed of sattva (सत्त्व), rajas (रजस्) and tamas (तमस्) in a state of homogeneity, which works in dual way.
When a predominance of cosmic sattva (सत्त्व), overwhelming rajas (रजस्) and tamas (तमस्), reflects the Universal Brahman (ब्रह्मन्) in itself, that reflected consciousness in the universal sattva(सत्त्व) is Ishvara (ईश्वर).
a. Maya (māyā माया) When the element of sattva (सत्त्व) is pure, prakṛti (प्रकृति) is known as māyā (माया). The universal sattva(सत्त्व) itself is called māyā (माया). The prakṛti (प्रकृति) operates cosmically and reflects the Universal (Brahman ब्रह्मन्) consciousness in it. Maya is under the control of Ishvara (ईश्वर).
b. Avidya (avidyā (अविद्या) is impure prakṛti, being mixed up with rajas (रजस्) and tamas (तमस्).
The jīva ( जीव), which is brahman (ब्रह्मन्) reflected in avidyā (अविद्या) is subjected to impure sattva. The jīva ( जीव) is of different grades due to (degrees of) admixture (of rajas (रजस्) and tamas (तमस्) with sattva (सत्त्व). The avidyā (अविद्या, nescience) is the causal body. The avidyā (अविद्या) controls the jīva ( जीव), but avidyā (अविद्या) is not under the control of the jīva ( जीव) or the individual, while īśvara (ईश्वर) controls māyā (माया). That is the difference between īśvara (ईश्वर) and jīva ( जीव), God and the individual.
When the jīva (जीव) identifies himself with this causal body (ānandamaya kośa, आनन्दमय कोश) in deep sleep it is called prājñā (प्राज्ञा). During the dream state is called taijasa (तैजस), and in the waking state is called viśva (विश्व).